<template>
  <div class="shopcart">
    <div class="content" @click="toggleList">
      <div class="content-left">
        <div class="logo-wrapper">
          <div class="logo" :class="{'highlight':totalCount>0}">
            <i class="icon-shopping_cart" :class="{'highlight':totalCount>0}"></i>
          </div>
          <div class="num" v-show="totalCount>0">{{totalCount}}</div>
        </div>
        <div class="price" :class="{'highlight':totalPrice>0}">￥{{totalPrice}}</div>
        <div class="desc">另需配送费￥{{deliveryPrice}}元</div>
      </div>
      <div class="content-right">
        <div class="pay" :class="palClass">{{payDesc}}</div>
      </div>
    </div>
    <div class="ball-container">
      <transition-group
        name="drop"
        @before-enter="beforeEnter"
        @enter="enter"
        @after-enter="afterEnter"
      >
        <div class="ball" v-for="(ball, index) in balls" v-show="ball.show" :key="ball+index">
          <div class="inner inner-hook"></div>
        </div>
      </transition-group>
    </div>
    <transition name="fold">
      <div class="shopcart-list" v-show="listShow">
        <div class="list-header">
          <h1 class="title">购物车</h1>
          <span class="empty">清空</span>
        </div>
        <div class="list-content">
          <ul>
            <li class="food" v-for="(food, index) in selectFoods" :key="index">
              <span class="name">{{food.name}}</span>
              <div class="price">
                <span>￥{{food.price * food.count}}</span>
              </div>
              <div class="cartcontrol-wrapper">
                <cartcontrol :food="food"></cartcontrol>
              </div>
            </li>
          </ul>
        </div>
      </div>
    </transition>
  </div>
</template>

<script type="text/ecmascript-6">
import cartcontrol from 'components/cartcontrol/cartcontrol';

export default {
  props: {
    selectFoods: {
      type: Array,
      default () {
        return [{
          price: 10,
          count: 1
        }];
      }
    },
    deliveryPrice: {
      type: Number,
      default: 0
    },
    minPrice: {
      type: Number,
      default: 0
    }
  },
  data () {
    return {
      balls: [
        { show: false },
        { show: false },
        { show: false },
        { show: false },
        { show: false }
      ],
      dropBalls: [],
      fold: true
    };
  },
  computed: {
    totalPrice () {
      let total = 0;
      this.selectFoods.forEach((food) => {
        total += food.price * food.count;
      });
      return total;
    },
    totalCount () {
      let count = 0;
      this.selectFoods.forEach((food) => {
        count += food.count;
      });
      return count;
    },
    payDesc () {
      if (this.totalPrice === 0) {
        return `￥${this.minPrice}元起送`;
      } else if (this.totalPrice < this.minPrice) {
        let diff = this.minPrice - this.totalPrice;
        return `还差￥${diff}元起送`;
      } else {
        return '去结算';
      }
    },
    palClass () {
      if (this.totalPrice < this.minPrice) {
        return 'not-enough';
      } else {
        return 'enough';
      }
    },
    listShow () {
      // get() {
      //   console.log(12113);
      //   return this.fold;
      // },
      // set() {
      console.log(1212);
      if (!this.totalCount) {
        // this.fold = true;
        return false;
      }
      let listshow = !this.fold;
      return listshow;
    }
    // }
  },
  methods: {
    drop (el) {
      for (let i = 0; i < this.balls.length; i++) {
        let ball = this.balls[i];
        if (!ball.show) {
          ball.show = true;
          ball.el = el;
          this.dropBalls.push(ball);
          return;
        }
      }
    },
    toggleList () {
      if (!this.totalCount) {
        return;
      }
      this.fold = !this.fold;
      console.log(this.fold);
    },
    beforeEnter (el) {
      let count = this.balls.length;
      while (count--) {
        let ball = this.balls[count];
        if (ball.show) {
          let rect = ball.el.getBoundingClientRect();
          let x = rect.left - 32;
          let y = -(window.innerHeight - rect.top - 22);
          el.style.display = '';
          el.style.webkitTransform = `translate3d(0, ${y}px, 0)`;
          el.style.transform = `translate3d(0, ${y}px, 0)`;
          let inner = el.getElementsByClassName('inner-hook')[0];
          inner.style.webkitTransform = `translate3d(${x}px, 0, 0)`;
          inner.style.transform = `translate3d(${x}px, 0, 0)`;
        }
      }
    },
    enter (el) {
      /* eslint-disable no-unused-vars */
      let rf = el.offsetHeight;
      this.$nextTick(() => {
        el.style.webkitTransform = 'translate3d(0, 0, 0)';
        el.style.transform = 'translate3d(0, 0, 0)';
        let inner = el.getElementsByClassName('inner-hook')[0];
        inner.style.webkitTransform = 'translate3d(0, 0, 0)';
        inner.style.transform = 'translate3d(0, 0, 0)';
      });
    },
    afterEnter (el) {
      let ball = this.dropBalls.shift();
      if (ball) {
        ball.show = false;
        el.style.display = 'none';
      }
    }
  },
  components: {
    cartcontrol
  }
};
</script>

<style lang="stylus" rel="stylesheet/stylus">
@import '../../common/stylus/mixin.styl'

.shopcart
  position: fixed
  left: 0
  bottom: 0
  z-index: 50
  width: 100%
  height: 48px
  .content
    display: flex
    background: #141d27
    font-size: 0
    color: rgba(255, 255, 255, 0.4)
    .content-left
      flex: 1
      .logo-wrapper
        display: inline-block
        position: relative
        top: -10px
        margin: 0 12px
        padding: 6px
        width: 56px
        height: 56px
        box-sizing: border-box
        vertical-align: top
        border-radius: 50%
        background: #141d27
        .logo
          width: 100%
          height: 100%
          border-radius: 50%
          text-align: center
          background: #2b343c
          &.highlight
            background: rgb(0, 160, 220)
          .icon-shopping_cart
            line-height: 44px
            font-size: 24px
            color: #80858a
            &.highlight
              color: #fff
        .num
          position: absolute
          top: 0
          right: 0
          width: 24px
          height: 16px
          line-height: 16px
          text-align: center
          border-radius: 16px
          font-size: 9px
          font-weight: 700
          color: #fff
          background: rgb(240, 20, 20)
          box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.4)
      .price
        display: inline-block
        vertical-align: top
        margin-top: 12px
        line-height: 24px
        padding-right: 12px
        border-right: 1px solid rgba(255, 255, 255, 0.1)
        box-sizing: border-box
        font-size: 16px
        font-weight: 700
        &.highlight
          color: #fff
      .desc
        display: inline-block
        vertical-align: top
        line-height: 24px
        margin: 12px 0 0 12px
        font-size: 10px
    .content-right
      flex: 0 0 105px
      width: 105px
      .pay
        height: 48px
        line-height: 48px
        text-align: center
        font-size: 12px
        font-weight: 700
        background: #2b333b
        &.not-enough
          background: #2b333b
        &.enough
          background: #00b43c
          color: #fff
  .ball-container
    .ball
      position: fixed
      left: 32px
      bottom: 22px
      z-index: 200
      &.drop-enter-active, &.drop-leave-active
        transition: all 0.4s cubic-bezier(0.49, -0.29, 0.75, 0.41)
      .inner
        width: 16px
        height: 16px
        border-radius: 50%
        background: rgb(0, 160, 220)
        transition: all 0.4s linear
  .shopcart-list
    position: absolute
    top: 0
    left: 0
    z-index: -1
    width: 100%
    &.fold-enter-active, &.fold-leave-active
      transition: all 5s
    &.fold-enter, &.fold-leave-to
      transform: translate3d(0, -100%, 0)
    .list-header
      height: 40px
      line-height: 40px
      padding: 0 18px
      background: #f3f5f7
      border-bottom: 1px solid rgba(7, 17, 27, 0.1)
      .title
        float: left
        font-size: 14px
        color: rgb(7, 17, 27)
      .empty
        float: right
        font-size: 12px
        color: rgb(0, 160, 220)
    .list-content
      padding: 0 18px
      max-height: 217px
      overflow: hidden
      background: #fff
      .food
        position: relative
        padding: 12px 0
        box-sizing: border-box
        border-1px(rgba(7, 17, 27, 0.1))
        .name
          line-height: 24px
          font-size: 14px
          color: rgb(7, 17, 27)
        .price
          position: absolute
          right: 90px
          bottom: 12px
          line-height: 24px
          font-size: 14px
          font-weight: 700px
          color: rgb(240, 20, 20)
        .cartcontrol-wrapper
          position: absolute
          right: 0
          bottom: 6px
</style>
